Modeling of CBN Tool Flank Wear Progression in Finish Hard Turning
Modeling of CBN Tool Flank Wear Progression in Finish Hard Turning
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DOI：
10.1115/1.1644543
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发表时间：
2004-02
影响因子：
4
通讯作者：
Yong Huang;S. Liang
中科院分区：
文献类型：
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作者：
Yong Huang;S. Liang
立方氮化硼（CBN）刀具广泛用于淬硬零件的精车加工。鉴于CBN刀具的高成本以及影响CBN精密硬车削经济合理性的刀具更换停机时间成本，它们的磨损机制和相关磨损率是需要理解的重要问题。本研究的目的是提出一种方法来分析模型的CBN刀具后刀面磨损率作为刀具/工件材料特性，切削参数和工艺安排的函数在三维精硬车削。用CBN刀片精车淬硬52100轴承钢的实验数据对模型进行了标定，并在实际硬态车削条件下进行了验证。结果表明，附着力是主要的磨损机制，在常见的切削条件下，这与文献记载的意见一致，但是，化学扩散可以获得主导地位，在较长的加工时间在侵略性的切削条件下。
Cubic Boron Nitride (CBN) cutters are widely used in finish turning of hardened parts. Their wear mechanisms and associated wear rates are important issues to be understood in view of the high cost of CBN cutters and because of the tool change down-time cost which impacts the economic justification of CBN precision hard turning. The objective of this study is to present a methodology to analytically model the CBN tool flank wear rate as a function of tool/workpiece material properties, cutting parameters and process arrangement in three-dimensional finish hard turning. The proposed model is calibrated with experimental data of finish turning of hardened 52100 bearing steel with a CBN insert, and further validated over practical hard turning conditions. It is shown that adhesion is the main wear mechanism over common cutting conditions, which agrees with documented observations, however, chemical diffusion can gain dominance over extended periods of machining time under aggressive cutting conditions.